public Entity(Texture2D tex, Rectangle bounds, World world, Body body = null, float density = 10.0f)
: base(tex)
{
entityWorld = world;
if (body == null)
{
entityBody = BodyFactory.CreateCircle(world,
WorldConversions.ConvertFromPixels(tex.Width / 2), density);
}
else
{
entityBody = body;
}
// Set the Entity instance as userdata so we can reference it later
// e.g. in collisions
Body.UserData = this;
entityBody.BodyType = BodyType.Dynamic;
entityBody.AngularDamping = 0.1f;
float mass = entityBody.Mass;
MaxAngularVelocity = 2.0f;
LevelBounds = bounds;
TorqueForce = 30.0f;
Damage = 0f;
}
public virtual bool UpdateEntity(GameTime time)
{
base.Position = WorldConversions.ConvertFromWorld(entityBody.Position);
base.Rotation = entityBody.Rotation;
// Reset the velocity damping
if (Velocity < MaxLinearVelocity)
{
Body.LinearDamping = 0;
}
return(true);
}
/// <summary>
/// Deaccelerate the ship
/// </summary>
/// <param name="amount">1.0 is maximun engine thrust, 0.0 is minimum</param>
/// <returns>false if max speed limit achieved</returns>
public virtual bool Deaccelerate(float amount = 1.0f)
{
amount = MathHelper.Clamp(amount, -1.0f, 1.0f);
bool result = false;
if (FrontThruster != null)
{
result = Thrust(FrontThruster, amount);
if (FrontThruster.Effect != null)
{
Vector2 posLocal = Body.GetWorldPoint(
new Vector2(0, -WorldConversions.ConvertFromPixels(Texture.Height / 2)));
FrontThruster.Effect.Position = WorldConversions.ConvertFromWorld(posLocal);
FrontThruster.Effect.Rotation = Rotation;
if (amount != 0)
{
FrontThruster.Effect.Generate(10);
}
}
}
return(result);
}
